Correct me if I'm wrong. So if I want to get this idea across: I didn't text her cuz I don't want to impose, I'm not sure she likes me.

"I don't want to peddle my services" is fine, meaning "I don't want to sell my services". "Impose my services" sounds very wrong. By the way, the common expression is actually "peddle my wares", which typically refers to goods rather than services.